Joao Zwetsch defeated Otavio Della 6-1 5-7 6-3 in the Brazil 1 Masters 2 round of 32 on clay.
Zwetsch J. came through in three sets.
Joao Zwetsch beat Otavio Della 6-1 5-7 6-3. Umpiry, "Joao Zwetsch vs Otavio Della — Brazil 1 Masters 2 Round of 32", https://umpiry.com/match/1991-03-18/della-vs-zwetsch-brazil-1-masters-2-r32?utm_source=cite (as of 18 March 1991).